Linux server scp does not require password configuration

Linux server scp does not require password configuration case: ▲ server A performs ssh connection to server B and server C, do not enter A password or www.2cto.com ▲ server A Copies files to server B and server C (the source file is on server A). do not enter A password for host A: 192.168.0.221 host B: 192.168.0...
Linux server scp does not require password configuration case: ▲ server A performs ssh connection to server B and server C, do not enter A password or www.2cto.com ▲ server A Copies files to server B and server C (the source file is on server A). do not enter A password for host A: 192.168.0.221 host B: 192.168.0.227 host C: 192.168.0.228 1. run the command script on each server (host A, host B, and host C are all executed to generate the public key and private key) mkdir-p ~ /. Ssh chmod 700 ~ /. Ssh/usr/bin/ssh-keygen-t rsa) 2. then, you need to execute (target host B and C) touch ~ on the host to be distributed in batches ~ /. Ssh/authorized_keys Method 1: ssh 192.168.0.221 cat ~ /. Ssh/id_rsa.pub> ~ /. Ssh/authorized_keys (the command above indicates that the file on the server 192.168.0.221 (host A) is ~ The content of/. ssh/id_rsa.pub is appended to the local (host B, C) file ~ /. Ssh/authorized_keys description: 192.168.0.221 is the IP address of the distribution host (source host A) root@192.168.0.221's password: xxxxx (enter the password when you need to enter the password) method 2 (also A simple method): directly log on to the server 192.168.0.221 (host A) and run the command cat ~ /. Ssh/id_rsa.pub view the content (public key), copy and append the content to the files of host B and host C ~ /. Ssh/authorized_keys 3. execute the command on the host to be distributed (target host B, C) www.2cto.com chmod 600 ~ /. Ssh/authorized_keys 4. verify on the distribution host (source host) connect from host A to host B test ssh 192.168.0.227 connect from host A to host C test ssh 192.168.0.228 5. common scp on distribution host (source host. sh file, usually set the file to the scheduled script/etc/crontab, or manually execute it separately. Distribute files scp-r/usr/local/adsit/webapps/preroll/WEB-INF/classes root@192.168.0.227 from the distribution host 192.168.0.221 to 192.168.0.227 and 192.168.0.228: /home/adsit/scp-r/usr/local/adsit/webapps/preroll/WEB-INF/classes root@192.168.0.228:/home/adsit/execute scp on the distribution host. sh implements the Copy function.